<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>


<body>
    <input type="text" style="width: 800px; height: 200px; font-size: 180px;">
    <script>
        // 需求：页面中按下 s 键，表单获取光标
        let input = document.querySelector('input');
        document.addEventListener('keyup', function (e) {
            if (e.key == 's' || e.key == 'S') {
                console.log('ok');
                input.focus();
            } else {
                console.log('no');
            }
        });
    </script>
</body>

</html>